All of our external customers have their own AAD / Entra ID and wish to not manage multiple identities. As we present our applications via AVD, it requires them to have a separate identity in our ten...
The workaround can be to set up a federation trust between main tenant and customers' tenants using Azure AD Federation. This allows users to authenticate in their own tenant but gain access to services in the main tenant without needing separate credentials.
However, federation requires some setup and collaboration between IT teams from both organizations.